<html>
    <head>
        <meta charset="utf8"> <!-- 设置字符编码为UTF-8，支持中文显示 -->
    </head>
    <body>
        <form action="/login" method="post"> <!-- 表单定义 -->
            <input type="text" name="username"><br/>     <!-- 用户名输入框 -->
            <input type="password" name="password"><br/> <!-- 密码输入框 -->
            <input type="submit" value="提交" name="submit"> <!-- 提交按钮 -->
        </form>
    </body>
</html>